/*
- * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
+ * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* Maintained at www.Open-FCoE.org
*/
+#include <linux/types.h>
#include <linux/module.h>
-#include <linux/version.h>
#include <linux/kernel.h>
+#include <linux/list.h>
#include <linux/spinlock.h>
-#include <linux/skbuff.h>
+#include <linux/timer.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
-#include <linux/kthread.h>
-#include <linux/crc32.h>
-#include <linux/cpu.h>
-#include <linux/fs.h>
-#include <linux/sysfs.h>
-#include <linux/ctype.h>
-#include <scsi/scsi_tcq.h>
-#include <scsi/scsicam.h>
-#include <scsi/scsi_transport.h>
-#include <scsi/scsi_transport_fc.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+#include <linux/bitops.h>
#include <net/rtnetlink.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fs.h>
+#include <scsi/fc/fc_fip.h>
#include <scsi/fc/fc_encaps.h>
+#include <scsi/fc/fc_fcoe.h>
#include <scsi/libfc.h>
-#include <scsi/fc_frame.h>
#include <scsi/libfcoe.h>
-#include <scsi/fc_transport_fcoe.h>
-
-static int debug_fcoe;
-#define FCOE_MAX_QUEUE_DEPTH 256
-#define FCOE_LOW_QUEUE_DEPTH 32
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs");
+MODULE_LICENSE("GPL v2");
-/* destination address mode */
-#define FCOE_GW_ADDR_MODE 0x00
-#define FCOE_FCOUI_ADDR_MODE 0x01
+#define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
+#define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
-#define FCOE_WORD_TO_BYTE 4
+static void fcoe_ctlr_timeout(unsigned long);
+static void fcoe_ctlr_link_work(struct work_struct *);
+static void fcoe_ctlr_recv_work(struct work_struct *);
-MODULE_AUTHOR("Open-FCoE.org");
-MODULE_DESCRIPTION("FCoE");
-MODULE_LICENSE("GPL");
+static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
-/* fcoe host list */
-LIST_HEAD(fcoe_hostlist);
-DEFINE_RWLOCK(fcoe_hostlist_lock);
-DEFINE_TIMER(fcoe_timer, NULL, 0, 0);
-struct fcoe_percpu_s *fcoe_percpu[NR_CPUS];
+static u32 fcoe_ctlr_debug; /* 1 for basic, 2 for noisy debug */
+#define FIP_DBG_LVL(level, fmt, args...) \
+ do { \
+ if (fcoe_ctlr_debug >= (level)) \
+ FC_DBG(fmt, ##args); \
+ } while (0)
-/* Function Prototyes */
-static int fcoe_check_wait_queue(struct fc_lport *);
-static void fcoe_recv_flogi(struct fcoe_softc *, struct fc_frame *, u8 *);
-#ifdef CONFIG_HOTPLUG_CPU
-static int fcoe_cpu_callback(struct notifier_block *, ulong, void *);
-#endif /* CONFIG_HOTPLUG_CPU */
-static int fcoe_device_notification(struct notifier_block *, ulong, void *);
-static void fcoe_dev_setup(void);
-static void fcoe_dev_cleanup(void);
+#define FIP_DBG(fmt, args...) FIP_DBG_LVL(1, fmt, ##args)
-/* notification function from net device */
-static struct notifier_block fcoe_notifier = {
- .notifier_call = fcoe_device_notification,
-};
+/*
+ * Return non-zero if FCF fcoe_size has been validated.
+ */
+static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
+{
+ return (fcf->flags & FIP_FL_SOL) != 0;
+}
+/*
+ * Return non-zero if the FCF is usable.
+ */
+static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
+{
+ u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
-#ifdef CONFIG_HOTPLUG_CPU
-static struct notifier_block fcoe_cpu_notifier = {
- .notifier_call = fcoe_cpu_callback,
-};
+ return (fcf->flags & flags) == flags;
+}
/**
- * fcoe_create_percpu_data() - creates the associated cpu data
- * @cpu: index for the cpu where fcoe cpu data will be created
- *
- * create percpu stats block, from cpu add notifier
- *
- * Returns: none
+ * fcoe_ctlr_init() - Initialize the FCoE Controller instance.
+ * @fip: FCoE controller.
*/
-static void fcoe_create_percpu_data(int cpu)
+void fcoe_ctlr_init(struct fcoe_ctlr *fip)
{
- struct fc_lport *lp;
- struct fcoe_softc *fc;
-
- write_lock_bh(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- lp = fc->lp;
- if (lp->dev_stats[cpu] == NULL)
- lp->dev_stats[cpu] =
- kzalloc(sizeof(struct fcoe_dev_stats),
- GFP_KERNEL);
- }
- write_unlock_bh(&fcoe_hostlist_lock);
+ fip->state = FIP_ST_LINK_WAIT;
+ INIT_LIST_HEAD(&fip->fcfs);
+ spin_lock_init(&fip->lock);
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip);
+ INIT_WORK(&fip->link_work, fcoe_ctlr_link_work);
+ INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
+ skb_queue_head_init(&fip->fip_recv_list);
}
+EXPORT_SYMBOL(fcoe_ctlr_init);
/**
- * fcoe_destroy_percpu_data() - destroys the associated cpu data
- * @cpu: index for the cpu where fcoe cpu data will destroyed
- *
- * destroy percpu stats block called by cpu add/remove notifier
+ * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller.
+ * @fip: FCoE controller.
*
- * Retuns: none
+ * Called with &fcoe_ctlr lock held.
*/
-static void fcoe_destroy_percpu_data(int cpu)
+static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
{
- struct fc_lport *lp;
- struct fcoe_softc *fc;
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *next;
- write_lock_bh(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- lp = fc->lp;
- kfree(lp->dev_stats[cpu]);
- lp->dev_stats[cpu] = NULL;
+ fip->sel_fcf = NULL;
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ list_del(&fcf->list);
+ kfree(fcf);
}
- write_unlock_bh(&fcoe_hostlist_lock);
+ fip->fcf_count = 0;
+ fip->sel_time = 0;
}
/**
- * fcoe_cpu_callback() - fcoe cpu hotplug event callback
- * @nfb: callback data block
- * @action: event triggering the callback
- * @hcpu: index for the cpu of this event
+ * fcoe_ctrl_destroy() - Disable and tear-down the FCoE controller.
+ * @fip: FCoE controller.
+ *
+ * This is called by FCoE drivers before freeing the &fcoe_ctlr.
*
- * this creates or destroys per cpu data for fcoe
+ * The receive handler will have been deleted before this to guarantee
+ * that no more recv_work will be scheduled.
*
- * Returns NOTIFY_OK always.
+ * The timer routine will simply return once we set FIP_ST_DISABLED.
+ * This guarantees that no further timeouts or work will be scheduled.
*/
-static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action,
- void *hcpu)
+void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- fcoe_create_percpu_data(cpu);
- break;
- case CPU_DEAD:
- fcoe_destroy_percpu_data(cpu);
- break;
- default:
- break;
- }
- return NOTIFY_OK;
+ flush_work(&fip->recv_work);
+ spin_lock_bh(&fip->lock);
+ fip->state = FIP_ST_DISABLED;
+ fcoe_ctlr_reset_fcfs(fip);
+ spin_unlock_bh(&fip->lock);
+ del_timer_sync(&fip->timer);
+ flush_work(&fip->link_work);
}
-#endif /* CONFIG_HOTPLUG_CPU */
+EXPORT_SYMBOL(fcoe_ctlr_destroy);
/**
- * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ
- * @skb: the receive skb
- * @dev: associated net device
- * @ptype: context
- * @odldev: last device
- *
- * this function will receive the packet and build fc frame and pass it up
+ * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port.
+ * @fip: FCoE controller.
*
- * Returns: 0 for success
+ * Returns the maximum packet size including the FCoE header and trailer,
+ * but not including any Ethernet or VLAN headers.
*/
-int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype, struct net_device *olddev)
+static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
{
- struct fc_lport *lp;
- struct fcoe_rcv_info *fr;
- struct fcoe_softc *fc;
- struct fcoe_dev_stats *stats;
- struct fc_frame_header *fh;
- unsigned short oxid;
- int cpu_idx;
- struct fcoe_percpu_s *fps;
-
- fc = container_of(ptype, struct fcoe_softc, fcoe_packet_type);
- lp = fc->lp;
- if (unlikely(lp == NULL)) {
- FC_DBG("cannot find hba structure");
- goto err2;
- }
-
- if (unlikely(debug_fcoe)) {
- FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p tail:%p "
- "end:%p sum:%d dev:%s", skb->len, skb->data_len,
- skb->head, skb->data, skb_tail_pointer(skb),
- skb_end_pointer(skb), skb->csum,
- skb->dev ? skb->dev->name : "<NULL>");
+ /*
+ * Determine the max FCoE frame size allowed, including
+ * FCoE header and trailer.
+ * Note: lp->mfs is currently the payload size, not the frame size.
+ */
+ return fip->lp->mfs + sizeof(struct fc_frame_header) +
+ sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
+}
- }
+/**
+ * fcoe_ctlr_solicit() - Send a solicitation.
+ * @fip: FCoE controller.
+ * @fcf: Destination FCF. If NULL, a multicast solicitation is sent.
+ */
+static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
+{
+ struct sk_buff *skb;
+ struct fip_sol {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct {
+ struct fip_mac_desc mac;
+ struct fip_wwn_desc wwnn;
+ struct fip_size_desc size;
+ } __attribute__((packed)) desc;
+ } __attribute__((packed)) *sol;
+ u32 fcoe_size;
+
+ skb = dev_alloc_skb(sizeof(*sol));
+ if (!skb)
+ return;
- /* check for FCOE packet type */
- if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
- FC_DBG("wrong FC type frame");
- goto err;
- }
+ sol = (struct fip_sol *)skb->data;
- /*
- * Check for minimum frame length, and make sure required FCoE
- * and FC headers are pulled into the linear data area.
- */
- if (unlikely((skb->len < FCOE_MIN_FRAME) ||
- !pskb_may_pull(skb, FCOE_HEADER_LEN)))
- goto err;
+ memset(sol, 0, sizeof(*sol));
+ memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
+ memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ sol->eth.h_proto = htons(ETH_P_FIP);
- skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
- fh = (struct fc_frame_header *) skb_transport_header(skb);
+ sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ sol->fip.fip_op = htons(FIP_OP_DISC);
+ sol->fip.fip_subcode = FIP_SC_SOL;
+ sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
+ sol->fip.fip_flags = htons(FIP_FL_FPMA);
- oxid = ntohs(fh->fh_ox_id);
+ sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
+ memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
- fr = fcoe_dev_from_skb(skb);
- fr->fr_dev = lp;
- fr->ptype = ptype;
- cpu_idx = 0;
-#ifdef CONFIG_SMP
- /*
- * The incoming frame exchange id(oxid) is ANDed with num of online
- * cpu bits to get cpu_idx and then this cpu_idx is used for selecting
- * a per cpu kernel thread from fcoe_percpu. In case the cpu is
- * offline or no kernel thread for derived cpu_idx then cpu_idx is
- * initialize to first online cpu index.
- */
- cpu_idx = oxid & (num_online_cpus() - 1);
- if (!fcoe_percpu[cpu_idx] || !cpu_online(cpu_idx))
- cpu_idx = first_cpu(cpu_online_map);
-#endif
- fps = fcoe_percpu[cpu_idx];
+ sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
+ sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
+ put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
- spin_lock_bh(&fps->fcoe_rx_list.lock);
- __skb_queue_tail(&fps->fcoe_rx_list, skb);
- if (fps->fcoe_rx_list.qlen == 1)
- wake_up_process(fps->thread);
+ fcoe_size = fcoe_ctlr_fcoe_size(fip);
+ sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
+ sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
+ sol->desc.size.fd_size = htons(fcoe_size);
- spin_unlock_bh(&fps->fcoe_rx_list.lock);
+ skb_put(skb, sizeof(*sol));
+ skb->protocol = htons(ETH_P_802_3);
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+ fip->send(fip, skb);
- return 0;
-err:
-#ifdef CONFIG_SMP
- stats = lp->dev_stats[smp_processor_id()];
-#else
- stats = lp->dev_stats[0];
-#endif
- if (stats)
- stats->ErrorFrames++;
-
-err2:
- kfree_skb(skb);
- return -1;
+ if (!fcf)
+ fip->sol_time = jiffies;
}
-EXPORT_SYMBOL_GPL(fcoe_rcv);
/**
- * fcoe_start_io() - pass to netdev to start xmit for fcoe
- * @skb: the skb to be xmitted
+ * fcoe_ctlr_link_up() - Start FCoE controller.
+ * @fip: FCoE controller.
*
- * Returns: 0 for success
+ * Called from the LLD when the network link is ready.
*/
-static inline int fcoe_start_io(struct sk_buff *skb)
+void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
{
- int rc;
-
- skb_get(skb);
- rc = dev_queue_xmit(skb);
- if (rc != 0)
- return rc;
- kfree_skb(skb);
- return 0;
+ spin_lock_bh(&fip->lock);
+ if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
+ fip->last_link = 1;
+ fip->link = 1;
+ spin_unlock_bh(&fip->lock);
+ fc_linkup(fip->lp);
+ } else if (fip->state == FIP_ST_LINK_WAIT) {
+ fip->state = FIP_ST_AUTO;
+ fip->last_link = 1;
+ fip->link = 1;
+ spin_unlock_bh(&fip->lock);
+ FIP_DBG("%s", "setting AUTO mode.\n");
+ fc_linkup(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ } else
+ spin_unlock_bh(&fip->lock);
}
+EXPORT_SYMBOL(fcoe_ctlr_link_up);
/**
- * fcoe_get_paged_crc_eof() - in case we need alloc a page for crc_eof
- * @skb: the skb to be xmitted
- * @tlen: total len
+ * fcoe_ctlr_reset() - Reset FIP.
+ * @fip: FCoE controller.
+ * @new_state: FIP state to be entered.
*
- * Returns: 0 for success
+ * Returns non-zero if the link was up and now isn't.
*/
-static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
+static int fcoe_ctlr_reset(struct fcoe_ctlr *fip, enum fip_state new_state)
{
- struct fcoe_percpu_s *fps;
- struct page *page;
- int cpu_idx;
-
- cpu_idx = get_cpu();
- fps = fcoe_percpu[cpu_idx];
- page = fps->crc_eof_page;
- if (!page) {
- page = alloc_page(GFP_ATOMIC);
- if (!page) {
- put_cpu();
- return -ENOMEM;
- }
- fps->crc_eof_page = page;
- WARN_ON(fps->crc_eof_offset != 0);
+ struct fc_lport *lp = fip->lp;
+ int link_dropped;
+
+ spin_lock_bh(&fip->lock);
+ fcoe_ctlr_reset_fcfs(fip);
+ del_timer(&fip->timer);
+ fip->state = new_state;
+ fip->ctlr_ka_time = 0;
+ fip->port_ka_time = 0;
+ fip->sol_time = 0;
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fip->map_dest = 0;
+ fip->last_link = 0;
+ link_dropped = fip->link;
+ fip->link = 0;
+ spin_unlock_bh(&fip->lock);
+
+ if (link_dropped)
+ fc_linkdown(lp);
+
+ if (new_state == FIP_ST_ENABLED) {
+ fcoe_ctlr_solicit(fip, NULL);
+ fc_linkup(lp);
+ link_dropped = 0;
}
-
- get_page(page);
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
- fps->crc_eof_offset, tlen);
- skb->len += tlen;
- skb->data_len += tlen;
- skb->truesize += tlen;
- fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
-
- if (fps->crc_eof_offset >= PAGE_SIZE) {
- fps->crc_eof_page = NULL;
- fps->crc_eof_offset = 0;
- put_page(page);
- }
- put_cpu();
- return 0;
+ return link_dropped;
}
/**
- * fcoe_fc_crc() - calculates FC CRC in this fcoe skb
- * @fp: the fc_frame containg data to be checksummed
+ * fcoe_ctlr_link_down() - Stop FCoE controller.
+ * @fip: FCoE controller.
*
- * This uses crc32() to calculate the crc for fc frame
- * Return : 32 bit crc
+ * Returns non-zero if the link was up and now isn't.
+ *
+ * Called from the LLD when the network link is not ready.
+ * There may be multiple calls while the link is down.
*/
-u32 fcoe_fc_crc(struct fc_frame *fp)
+int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
{
- struct sk_buff *skb = fp_skb(fp);
- struct skb_frag_struct *frag;
- unsigned char *data;
- unsigned long off, len, clen;
- u32 crc;
- unsigned i;
-
- crc = crc32(~0, skb->data, skb_headlen(skb));
-
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
- frag = &skb_shinfo(skb)->frags[i];
- off = frag->page_offset;
- len = frag->size;
- while (len > 0) {
- clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
- data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
- KM_SKB_DATA_SOFTIRQ);
- crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
- kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
- off += clen;
- len -= clen;
- }
- }
- return crc;
+ return fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT);
}
-EXPORT_SYMBOL_GPL(fcoe_fc_crc);
+EXPORT_SYMBOL(fcoe_ctlr_link_down);
/**
- * fcoe_xmit() - FCoE frame transmit function
- * @lp: the associated local port
- * @fp: the fc_frame to be transmitted
+ * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF.
+ * @fip: FCoE controller.
+ * @ports: 0 for controller keep-alive, 1 for port keep-alive.
+ * @sa: source MAC address.
*
- * Return : 0 for success
+ * A controller keep-alive is sent every fka_period (typically 8 seconds).
+ * The source MAC is the native MAC address.
+ *
+ * A port keep-alive is sent every 90 seconds while logged in.
+ * The source MAC is the assigned mapped source address.
+ * The destination is the FCF's F-port.
*/
-int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
+static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, int ports, u8 *sa)
{
- int wlen, rc = 0;
- u32 crc;
- struct ethhdr *eh;
- struct fcoe_crc_eof *cp;
struct sk_buff *skb;
- struct fcoe_dev_stats *stats;
- struct fc_frame_header *fh;
- unsigned int hlen; /* header length implies the version */
- unsigned int tlen; /* trailer length */
- unsigned int elen; /* eth header, may include vlan */
- int flogi_in_progress = 0;
- struct fcoe_softc *fc;
- u8 sof, eof;
- struct fcoe_hdr *hp;
-
- WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
-
- fc = lport_priv(lp);
- /*
- * if it is a flogi then we need to learn gw-addr
- * and my own fcid
- */
- fh = fc_frame_header_get(fp);
- if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
- if (fc_frame_payload_op(fp) == ELS_FLOGI) {
- fc->flogi_oxid = ntohs(fh->fh_ox_id);
- fc->address_mode = FCOE_FCOUI_ADDR_MODE;
- fc->flogi_progress = 1;
- flogi_in_progress = 1;
- } else if (fc->flogi_progress && ntoh24(fh->fh_s_id) != 0) {
- /*
- * Here we must've gotten an SID by accepting an FLOGI
- * from a point-to-point connection. Switch to using
- * the source mac based on the SID. The destination
- * MAC in this case would have been set by receving the
- * FLOGI.
- */
- fc_fcoe_set_mac(fc->data_src_addr, fh->fh_s_id);
- fc->flogi_progress = 0;
- }
- }
-
- skb = fp_skb(fp);
- sof = fr_sof(fp);
- eof = fr_eof(fp);
-
- elen = (fc->real_dev->priv_flags & IFF_802_1Q_VLAN) ?
- sizeof(struct vlan_ethhdr) : sizeof(struct ethhdr);
- hlen = sizeof(struct fcoe_hdr);
- tlen = sizeof(struct fcoe_crc_eof);
- wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
-
- /* crc offload */
- if (likely(lp->crc_offload)) {
- skb->ip_summed = CHECKSUM_COMPLETE;
- skb->csum_start = skb_headroom(skb);
- skb->csum_offset = skb->len;
- crc = 0;
- } else {
- skb->ip_summed = CHECKSUM_NONE;
- crc = fcoe_fc_crc(fp);
- }
+ struct fip_kal {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_mac_desc mac;
+ } __attribute__((packed)) *kal;
+ struct fip_vn_desc *vn;
+ u32 len;
+ struct fc_lport *lp;
+ struct fcoe_fcf *fcf;
- /* copy fc crc and eof to the skb buff */
- if (skb_is_nonlinear(skb)) {
- skb_frag_t *frag;
- if (fcoe_get_paged_crc_eof(skb, tlen)) {
- kfree_skb(skb);
- return -ENOMEM;
- }
- frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
- cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
- + frag->page_offset;
- } else {
- cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
- }
+ fcf = fip->sel_fcf;
+ lp = fip->lp;
+ if (!fcf || !fc_host_port_id(lp->host))
+ return;
- memset(cp, 0, sizeof(*cp));
- cp->fcoe_eof = eof;
- cp->fcoe_crc32 = cpu_to_le32(~crc);
+ len = fcoe_ctlr_fcoe_size(fip) + sizeof(struct ethhdr);
+ BUG_ON(len < sizeof(*kal) + sizeof(*vn));
+ skb = dev_alloc_skb(len);
+ if (!skb)
+ return;
- if (skb_is_nonlinear(skb)) {
- kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
- cp = NULL;
+ kal = (struct fip_kal *)skb->data;
+ memset(kal, 0, len);
+ memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
+ memcpy(kal->eth.h_source, sa, ETH_ALEN);
+ kal->eth.h_proto = htons(ETH_P_FIP);
+
+ kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ kal->fip.fip_op = htons(FIP_OP_CTRL);
+ kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
+ kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
+ ports * sizeof(*vn)) / FIP_BPW);
+ kal->fip.fip_flags = htons(FIP_FL_FPMA);
+
+ kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
+ memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
+
+ if (ports) {
+ vn = (struct fip_vn_desc *)(kal + 1);
+ vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
+ vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
+ memcpy(vn->fd_mac, fip->data_src_addr, ETH_ALEN);
+ hton24(vn->fd_fc_id, fc_host_port_id(lp->host));
+ put_unaligned_be64(lp->wwpn, &vn->fd_wwpn);
}
- /* adjust skb netowrk/transport offsets to match mac/fcoe/fc */
- skb_push(skb, elen + hlen);
+ skb_put(skb, len);
+ skb->protocol = htons(ETH_P_802_3);
skb_reset_mac_header(skb);
skb_reset_network_header(skb);
- skb->mac_len = elen;
- skb->protocol = htons(ETH_P_802_3);
- skb->dev = fc->real_dev;
-
- /* fill up mac and fcoe headers */
- eh = eth_hdr(skb);
- eh->h_proto = htons(ETH_P_FCOE);
- if (fc->address_mode == FCOE_FCOUI_ADDR_MODE)
- fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
- else
- /* insert GW address */
- memcpy(eh->h_dest, fc->dest_addr, ETH_ALEN);
-
- if (unlikely(flogi_in_progress))
- memcpy(eh->h_source, fc->ctl_src_addr, ETH_ALEN);
- else
- memcpy(eh->h_source, fc->data_src_addr, ETH_ALEN);
-
- hp = (struct fcoe_hdr *)(eh + 1);
- memset(hp, 0, sizeof(*hp));
- if (FC_FCOE_VER)
- FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
- hp->fcoe_sof = sof;
-
- /* update tx stats: regardless if LLD fails */
- stats = lp->dev_stats[smp_processor_id()];
- if (stats) {
- stats->TxFrames++;
- stats->TxWords += wlen;
- }
-
- /* send down to lld */
- fr_dev(fp) = lp;
- if (fc->fcoe_pending_queue.qlen)
- rc = fcoe_check_wait_queue(lp);
-
- if (rc == 0)
- rc = fcoe_start_io(skb);
-
- if (rc) {
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
- __skb_queue_tail(&fc->fcoe_pending_queue, skb);
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
- if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
- lp->qfull = 1;
- }
-
- return 0;
+ fip->send(fip, skb);
}
-EXPORT_SYMBOL_GPL(fcoe_xmit);
/**
- * fcoe_percpu_receive_thread() - recv thread per cpu
- * @arg: ptr to the fcoe per cpu struct
+ * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it.
+ * @fip: FCoE controller.
+ * @dtype: FIP descriptor type for the frame.
+ * @skb: FCoE ELS frame including FC header but no FCoE headers.
+ *
+ * Returns non-zero error code on failure.
+ *
+ * The caller must check that the length is a multiple of 4.
*
- * Return: 0 for success
+ * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
+ * Headroom includes the FIP encapsulation description, FIP header, and
+ * Ethernet header. The tailroom is for the FIP MAC descriptor.
*/
-int fcoe_percpu_receive_thread(void *arg)
+static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
+ u8 dtype, struct sk_buff *skb)
{
- struct fcoe_percpu_s *p = arg;
- u32 fr_len;
- struct fc_lport *lp;
- struct fcoe_rcv_info *fr;
- struct fcoe_dev_stats *stats;
- struct fc_frame_header *fh;
- struct sk_buff *skb;
- struct fcoe_crc_eof crc_eof;
- struct fc_frame *fp;
- u8 *mac = NULL;
- struct fcoe_softc *fc;
- struct fcoe_hdr *hp;
-
- set_user_nice(current, -20);
-
- while (!kthread_should_stop()) {
-
- spin_lock_bh(&p->fcoe_rx_list.lock);
- while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_bh(&p->fcoe_rx_list.lock);
- schedule();
- set_current_state(TASK_RUNNING);
- if (kthread_should_stop())
- return 0;
- spin_lock_bh(&p->fcoe_rx_list.lock);
- }
- spin_unlock_bh(&p->fcoe_rx_list.lock);
- fr = fcoe_dev_from_skb(skb);
- lp = fr->fr_dev;
- if (unlikely(lp == NULL)) {
- FC_DBG("invalid HBA Structure");
- kfree_skb(skb);
- continue;
- }
-
- stats = lp->dev_stats[smp_processor_id()];
+ struct fip_encaps_head {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_encaps encaps;
+ } __attribute__((packed)) *cap;
+ struct fip_mac_desc *mac;
+ struct fcoe_fcf *fcf;
+ size_t dlen;
+
+ fcf = fip->sel_fcf;
+ if (!fcf)
+ return -ENODEV;
+ dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
+ cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap));
+
+ memset(cap, 0, sizeof(*cap));
+ memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
+ memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ cap->eth.h_proto = htons(ETH_P_FIP);
+
+ cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ cap->fip.fip_op = htons(FIP_OP_LS);
+ cap->fip.fip_subcode = FIP_SC_REQ;
+ cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW);
+ cap->fip.fip_flags = htons(FIP_FL_FPMA);
+
+ cap->encaps.fd_desc.fip_dtype = dtype;
+ cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
+
+ mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac));
+ memset(mac, 0, sizeof(mac));
+ mac->fd_desc.fip_dtype = FIP_DT_MAC;
+ mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
+ if (dtype != ELS_FLOGI)
+ memcpy(mac->fd_mac, fip->data_src_addr, ETH_ALEN);
- if (unlikely(debug_fcoe)) {
- FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p "
- "tail:%p end:%p sum:%d dev:%s",
- skb->len, skb->data_len,
- skb->head, skb->data, skb_tail_pointer(skb),
- skb_end_pointer(skb), skb->csum,
- skb->dev ? skb->dev->name : "<NULL>");
- }
-
- /*
- * Save source MAC address before discarding header.
- */
- fc = lport_priv(lp);
- if (unlikely(fc->flogi_progress))
- mac = eth_hdr(skb)->h_source;
-
- if (skb_is_nonlinear(skb))
- skb_linearize(skb); /* not ideal */
-
- /*
- * Frame length checks and setting up the header pointers
- * was done in fcoe_rcv already.
- */
- hp = (struct fcoe_hdr *) skb_network_header(skb);
- fh = (struct fc_frame_header *) skb_transport_header(skb);
-
- if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
- if (stats) {
- if (stats->ErrorFrames < 5)
- FC_DBG("unknown FCoE version %x",
- FC_FCOE_DECAPS_VER(hp));
- stats->ErrorFrames++;
- }
- kfree_skb(skb);
- continue;
- }
-
- skb_pull(skb, sizeof(struct fcoe_hdr));
- fr_len = skb->len - sizeof(struct fcoe_crc_eof);
-
- if (stats) {
- stats->RxFrames++;
- stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
- }
-
- fp = (struct fc_frame *)skb;
- fc_frame_init(fp);
- fr_dev(fp) = lp;
- fr_sof(fp) = hp->fcoe_sof;
-
- /* Copy out the CRC and EOF trailer for access */
- if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
- kfree_skb(skb);
- continue;
- }
- fr_eof(fp) = crc_eof.fcoe_eof;
- fr_crc(fp) = crc_eof.fcoe_crc32;
- if (pskb_trim(skb, fr_len)) {
- kfree_skb(skb);
- continue;
- }
-
- /*
- * We only check CRC if no offload is available and if it is
- * it's solicited data, in which case, the FCP layer would
- * check it during the copy.
- */
- if (lp->crc_offload)
- fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
- else
- fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
-
- fh = fc_frame_header_get(fp);
- if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
- fh->fh_type == FC_TYPE_FCP) {
- fc_exch_recv(lp, lp->emp, fp);
- continue;
- }
- if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
- if (le32_to_cpu(fr_crc(fp)) !=
- ~crc32(~0, skb->data, fr_len)) {
- if (debug_fcoe || stats->InvalidCRCCount < 5)
- printk(KERN_WARNING "fcoe: dropping "
- "frame with CRC error\n");
- stats->InvalidCRCCount++;
- stats->ErrorFrames++;
- fc_frame_free(fp);
- continue;
- }
- fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
- }
- /* non flogi and non data exchanges are handled here */
- if (unlikely(fc->flogi_progress))
- fcoe_recv_flogi(fc, fp, mac);
- fc_exch_recv(lp, lp->emp, fp);
- }
+ skb->protocol = htons(ETH_P_802_3);
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
return 0;
}
/**
- * fcoe_recv_flogi() - flogi receive function
- * @fc: associated fcoe_softc
- * @fp: the recieved frame
- * @sa: the source address of this flogi
+ * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
+ * @fip: FCoE controller.
+ * @skb: FCoE ELS frame including FC header but no FCoE headers.
*
- * This is responsible to parse the flogi response and sets the corresponding
- * mac address for the initiator, eitehr OUI based or GW based.
+ * Returns a non-zero error code if the frame should not be sent.
+ * Returns zero if the caller should send the frame with FCoE encapsulation.
*
- * Returns: none
+ * The caller must check that the length is a multiple of 4.
+ * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
*/
-static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa)
+int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
struct fc_frame_header *fh;
+ u16 old_xid;
u8 op;
- fh = fc_frame_header_get(fp);
- if (fh->fh_type != FC_TYPE_ELS)
- return;
- op = fc_frame_payload_op(fp);
- if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
- fc->flogi_oxid == ntohs(fh->fh_ox_id)) {
- /*
- * FLOGI accepted.
- * If the src mac addr is FC_OUI-based, then we mark the
- * address_mode flag to use FC_OUI-based Ethernet DA.
- * Otherwise we use the FCoE gateway addr
- */
- if (!compare_ether_addr(sa, (u8[6]) FC_FCOE_FLOGI_MAC)) {
- fc->address_mode = FCOE_FCOUI_ADDR_MODE;
- } else {
- memcpy(fc->dest_addr, sa, ETH_ALEN);
- fc->address_mode = FCOE_GW_ADDR_MODE;
- }
+ if (fip->state == FIP_ST_NON_FIP)
+ return 0;
+ fh = (struct fc_frame_header *)skb->data;
+ op = *(u8 *)(fh + 1);
+
+ switch (op) {
+ case ELS_FLOGI:
+ old_xid = fip->flogi_oxid;
+ fip->flogi_oxid = ntohs(fh->fh_ox_id);
+ if (fip->state == FIP_ST_AUTO) {
+ if (old_xid == FC_XID_UNKNOWN)
+ fip->flogi_count = 0;
+ fip->flogi_count++;
+ if (fip->flogi_count < 3)
+ goto drop;
+ fip->map_dest = 1;
+ return 0;
+ }
+ op = FIP_DT_FLOGI;
+ break;
+ case ELS_FDISC:
+ if (ntoh24(fh->fh_s_id))
+ return 0;
+ op = FIP_DT_FDISC;
+ break;
+ case ELS_LOGO:
+ if (fip->state != FIP_ST_ENABLED)
+ return 0;
+ if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
+ return 0;
+ op = FIP_DT_LOGO;
+ break;
+ case ELS_LS_ACC:
+ if (fip->flogi_oxid == FC_XID_UNKNOWN)
+ return 0;
+ if (!ntoh24(fh->fh_s_id))
+ return 0;
+ if (fip->state == FIP_ST_AUTO)
+ return 0;
/*
- * Remove any previously-set unicast MAC filter.
- * Add secondary FCoE MAC address filter for our OUI.
- */
- rtnl_lock();
- if (compare_ether_addr(fc->data_src_addr, (u8[6]) { 0 }))
- dev_unicast_delete(fc->real_dev, fc->data_src_addr,
- ETH_ALEN);
- fc_fcoe_set_mac(fc->data_src_addr, fh->fh_d_id);
- dev_unicast_add(fc->real_dev, fc->data_src_addr, ETH_ALEN);
- rtnl_unlock();
-
- fc->flogi_progress = 0;
- } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
- /*
- * Save source MAC for point-to-point responses.
+ * Here we must've gotten an SID by accepting an FLOGI
+ * from a point-to-point connection. Switch to using
+ * the source mac based on the SID. The destination
+ * MAC in this case would have been set by receving the
+ * FLOGI.
*/
- memcpy(fc->dest_addr, sa, ETH_ALEN);
- fc->address_mode = FCOE_GW_ADDR_MODE;
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fc_fcoe_set_mac(fip->data_src_addr, fh->fh_s_id);
+ return 0;
+ default:
+ if (fip->state != FIP_ST_ENABLED)
+ goto drop;
+ return 0;
}
+ if (fcoe_ctlr_encaps(fip, op, skb))
+ goto drop;
+ fip->send(fip, skb);
+ return -EINPROGRESS;
+drop:
+ kfree_skb(skb);
+ return -EINVAL;
}
+EXPORT_SYMBOL(fcoe_ctlr_els_send);
-/**
- * fcoe_watchdog() - fcoe timer callback
- * @vp:
+/*
+ * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller.
+ * @fip: FCoE controller.
*
- * This checks the pending queue length for fcoe and set lport qfull
- * if the FCOE_MAX_QUEUE_DEPTH is reached. This is done for all fc_lport on the
- * fcoe_hostlist.
+ * Called with lock held.
*
- * Returns: 0 for success
+ * An FCF is considered old if we have missed three advertisements.
+ * That is, there have been no valid advertisement from it for three
+ * times its keep-alive period including fuzz.
+ *
+ * In addition, determine the time when an FCF selection can occur.
*/
-void fcoe_watchdog(ulong vp)
+static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
{
- struct fcoe_softc *fc;
-
- read_lock(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- if (fc->lp)
- fcoe_check_wait_queue(fc->lp);
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *next;
+ unsigned long sel_time = 0;
+
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ if (time_after(jiffies, fcf->time + fcf->fka_period * 3 +
+ msecs_to_jiffies(FIP_FCF_FUZZ * 3))) {
+ if (fip->sel_fcf == fcf)
+ fip->sel_fcf = NULL;
+ list_del(&fcf->list);
+ WARN_ON(!fip->fcf_count);
+ fip->fcf_count--;
+ kfree(fcf);
+ } else if (fcoe_ctlr_mtu_valid(fcf) &&
+ (!sel_time || time_before(sel_time, fcf->time))) {
+ sel_time = fcf->time;
+ }
+ }
+ if (sel_time) {
+ sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ fip->sel_time = sel_time;
+ if (time_before(sel_time, fip->timer.expires))
+ mod_timer(&fip->timer, sel_time);
+ } else {
+ fip->sel_time = 0;
}
- read_unlock(&fcoe_hostlist_lock);
-
- fcoe_timer.expires = jiffies + (1 * HZ);
- add_timer(&fcoe_timer);
}
-
/**
- * fcoe_check_wait_queue() - put the skb into fcoe pending xmit queue
- * @lp: the fc_port for this skb
- * @skb: the associated skb to be xmitted
+ * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry.
+ * @skb: received FIP advertisement frame
+ * @fcf: resulting FCF entry.
*
- * This empties the wait_queue, dequeue the head of the wait_queue queue
- * and calls fcoe_start_io() for each packet, if all skb have been
- * transmitted, return qlen or -1 if a error occurs, then restore
- * wait_queue and try again later.
- *
- * The wait_queue is used when the skb transmit fails. skb will go
- * in the wait_queue which will be emptied by the time function OR
- * by the next skb transmit.
- *
- * Returns: 0 for success
+ * Returns zero on a valid parsed advertisement,
+ * otherwise returns non zero value.
*/
-static int fcoe_check_wait_queue(struct fc_lport *lp)
+static int fcoe_ctlr_parse_adv(struct sk_buff *skb, struct fcoe_fcf *fcf)
{
- struct fcoe_softc *fc = lport_priv(lp);
- struct sk_buff *skb;
- int rc = -1;
-
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
- if (fc->fcoe_pending_queue_active)
- goto out;
- fc->fcoe_pending_queue_active = 1;
-
- while (fc->fcoe_pending_queue.qlen) {
- /* keep qlen > 0 until fcoe_start_io succeeds */
- fc->fcoe_pending_queue.qlen++;
- skb = __skb_dequeue(&fc->fcoe_pending_queue);
-
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
- rc = fcoe_start_io(skb);
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
-
- if (rc) {
- __skb_queue_head(&fc->fcoe_pending_queue, skb);
- /* undo temporary increment above */
- fc->fcoe_pending_queue.qlen--;
+ struct fip_header *fiph;
+ struct fip_desc *desc = NULL;
+ struct fip_wwn_desc *wwn;
+ struct fip_fab_desc *fab;
+ struct fip_fka_desc *fka;
+ unsigned long t;
+ size_t rlen;
+ size_t dlen;
+
+ memset(fcf, 0, sizeof(*fcf));
+ fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
+
+ fiph = (struct fip_header *)skb->data;
+ fcf->flags = ntohs(fiph->fip_flags);
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ return -EINVAL;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ return -EINVAL;
+ switch (desc->fip_dtype) {
+ case FIP_DT_PRI:
+ if (dlen != sizeof(struct fip_pri_desc))
+ goto len_err;
+ fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
break;
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ memcpy(fcf->fcf_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+ if (!is_valid_ether_addr(fcf->fcf_mac)) {
+ FIP_DBG("invalid MAC addr in FIP adv\n");
+ return -EINVAL;
+ }
+ break;
+ case FIP_DT_NAME:
+ if (dlen != sizeof(struct fip_wwn_desc))
+ goto len_err;
+ wwn = (struct fip_wwn_desc *)desc;
+ fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
+ break;
+ case FIP_DT_FAB:
+ if (dlen != sizeof(struct fip_fab_desc))
+ goto len_err;
+ fab = (struct fip_fab_desc *)desc;
+ fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn);
+ fcf->vfid = ntohs(fab->fd_vfid);
+ fcf->fc_map = ntoh24(fab->fd_map);
+ break;
+ case FIP_DT_FKA:
+ if (dlen != sizeof(struct fip_fka_desc))
+ goto len_err;
+ fka = (struct fip_fka_desc *)desc;
+ t = ntohl(fka->fd_fka_period);
+ if (t >= FCOE_CTLR_MIN_FKA)
+ fcf->fka_period = msecs_to_jiffies(t);
+ break;
+ case FIP_DT_MAP_OUI:
+ case FIP_DT_FCOE_SIZE:
+ case FIP_DT_FLOGI:
+ case FIP_DT_FDISC:
+ case FIP_DT_LOGO:
+ case FIP_DT_ELP:
+ default:
+ FIP_DBG("unexpected descriptor type %x in FIP adv\n",
+ desc->fip_dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
+ return -EINVAL;
+ continue;
}
- /* undo temporary increment above */
- fc->fcoe_pending_queue.qlen--;
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
}
+ if (!fcf->fc_map || (fcf->fc_map & 0x10000))
+ return -EINVAL;
+ if (!fcf->switch_name || !fcf->fabric_name)
+ return -EINVAL;
+ return 0;
- if (fc->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
- lp->qfull = 0;
- fc->fcoe_pending_queue_active = 0;
- rc = fc->fcoe_pending_queue.qlen;
-out:
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
- return rc;
+len_err:
+ FIP_DBG("FIP length error in descriptor type %x len %zu\n",
+ desc->fip_dtype, dlen);
+ return -EINVAL;
}
/**
- * fcoe_dev_setup() - setup link change notification interface
+ * fcoe_ctlr_recv_adv() - Handle an incoming advertisement.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
*/
-static void fcoe_dev_setup()
+static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf new;
+ struct fcoe_fcf *found;
+ unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV);
+ int first = 0;
+ int mtu_valid;
+
+ if (fcoe_ctlr_parse_adv(skb, &new))
+ return;
+
+ spin_lock_bh(&fip->lock);
+ first = list_empty(&fip->fcfs);
+ found = NULL;
+ list_for_each_entry(fcf, &fip->fcfs, list) {
+ if (fcf->switch_name == new.switch_name &&
+ fcf->fabric_name == new.fabric_name &&
+ fcf->fc_map == new.fc_map &&
+ compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) {
+ found = fcf;
+ break;
+ }
+ }
+ if (!found) {
+ if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
+ goto out;
+
+ fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
+ if (!fcf)
+ goto out;
+
+ fip->fcf_count++;
+ memcpy(fcf, &new, sizeof(new));
+ list_add(&fcf->list, &fip->fcfs);
+ } else {
+ /*
+ * Flags in advertisements are ignored once the FCF is
+ * selected. Flags in unsolicited advertisements are
+ * ignored after a usable solicited advertisement
+ * has been received.
+ */
+ if (fcf == fip->sel_fcf) {
+ fip->ctlr_ka_time -= fcf->fka_period;
+ fip->ctlr_ka_time += new.fka_period;
+ if (time_before(fip->ctlr_ka_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->ctlr_ka_time);
+ } else if (!fcoe_ctlr_fcf_usable(fcf))
+ fcf->flags = new.flags;
+ fcf->fka_period = new.fka_period;
+ memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
+ }
+ mtu_valid = fcoe_ctlr_mtu_valid(fcf);
+ fcf->time = jiffies;
+ FIP_DBG_LVL(found ? 2 : 1, "%s FCF for fab %llx map %x val %d\n",
+ found ? "old" : "new",
+ fcf->fabric_name, fcf->fc_map, mtu_valid);
+
/*
- * here setup a interface specific wd time to
- * monitor the link state
+ * If this advertisement is not solicited and our max receive size
+ * hasn't been verified, send a solicited advertisement.
*/
- register_netdevice_notifier(&fcoe_notifier);
-}
+ if (!mtu_valid)
+ fcoe_ctlr_solicit(fip, fcf);
-/**
- * fcoe_dev_setup() - cleanup link change notification interface
- */
-static void fcoe_dev_cleanup(void)
-{
- unregister_netdevice_notifier(&fcoe_notifier);
+ /*
+ * If its been a while since we did a solicit, and this is
+ * the first advertisement we've received, do a multicast
+ * solicitation to gather as many advertisements as we can
+ * before selection occurs.
+ */
+ if (first && time_after(jiffies, fip->sol_time + sol_tov))
+ fcoe_ctlr_solicit(fip, NULL);
+
+ /*
+ * If this is the first validated FCF, note the time and
+ * set a timer to trigger selection.
+ */
+ if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) {
+ fip->sel_time = jiffies +
+ msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ if (!timer_pending(&fip->timer) ||
+ time_before(fip->sel_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->sel_time);
+ }
+out:
+ spin_unlock_bh(&fip->lock);
}
/**
- * fcoe_device_notification() - netdev event notification callback
- * @notifier: context of the notification
- * @event: type of event
- * @ptr: fixed array for output parsed ifname
- *
- * This function is called by the ethernet driver in case of link change event
- *
- * Returns: 0 for success
+ * fcoe_ctlr_recv_els() - Handle an incoming FIP-encapsulated ELS frame.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
*/
-static int fcoe_device_notification(struct notifier_block *notifier,
- ulong event, void *ptr)
+static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- struct fc_lport *lp = NULL;
- struct net_device *real_dev = ptr;
- struct fcoe_softc *fc;
+ struct fc_lport *lp = fip->lp;
+ struct fip_header *fiph;
+ struct fc_frame *fp;
+ struct fc_frame_header *fh = NULL;
+ struct fip_desc *desc;
+ struct fip_encaps *els;
struct fcoe_dev_stats *stats;
- u32 new_link_up;
- u32 mfs;
- int rc = NOTIFY_OK;
-
- read_lock(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- if (fc->real_dev == real_dev) {
- lp = fc->lp;
+ enum fip_desc_type els_dtype = 0;
+ u8 els_op;
+ u8 sub;
+ u8 granted_mac[ETH_ALEN] = { 0 };
+ size_t els_len = 0;
+ size_t rlen;
+ size_t dlen;
+
+ fiph = (struct fip_header *)skb->data;
+ sub = fiph->fip_subcode;
+ if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
+ goto drop;
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ goto drop;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ goto drop;
+ switch (desc->fip_dtype) {
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ memcpy(granted_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+ if (!is_valid_ether_addr(granted_mac)) {
+ FIP_DBG("invalid MAC addrs in FIP ELS\n");
+ goto drop;
+ }
break;
+ case FIP_DT_FLOGI:
+ case FIP_DT_FDISC:
+ case FIP_DT_LOGO:
+ case FIP_DT_ELP:
+ if (fh)
+ goto drop;
+ if (dlen < sizeof(*els) + sizeof(*fh) + 1)
+ goto len_err;
+ els_len = dlen - sizeof(*els);
+ els = (struct fip_encaps *)desc;
+ fh = (struct fc_frame_header *)(els + 1);
+ els_dtype = desc->fip_dtype;
+ break;
+ default:
+ FIP_DBG("unexpected descriptor type %x "
+ "in FIP adv\n", desc->fip_dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
+ goto drop;
+ continue;
}
- }
- read_unlock(&fcoe_hostlist_lock);
- if (lp == NULL) {
- rc = NOTIFY_DONE;
- goto out;
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
}
- new_link_up = lp->link_up;
- switch (event) {
- case NETDEV_DOWN:
- case NETDEV_GOING_DOWN:
- new_link_up = 0;
- break;
- case NETDEV_UP:
- case NETDEV_CHANGE:
- new_link_up = !fcoe_link_ok(lp);
- break;
- case NETDEV_CHANGEMTU:
- mfs = fc->real_dev->mtu -
- (sizeof(struct fcoe_hdr) +
- sizeof(struct fcoe_crc_eof));
- if (mfs >= FC_MIN_MAX_FRAME)
- fc_set_mfs(lp, mfs);
- new_link_up = !fcoe_link_ok(lp);
- break;
- case NETDEV_REGISTER:
- break;
- default:
- FC_DBG("unknown event %ld call", event);
- }
- if (lp->link_up != new_link_up) {
- if (new_link_up)
- fc_linkup(lp);
- else {
- stats = lp->dev_stats[smp_processor_id()];
- if (stats)
- stats->LinkFailureCount++;
- fc_linkdown(lp);
- fcoe_clean_pending_queue(lp);
- }
- }
-out:
- return rc;
-}
+ if (!fh)
+ goto drop;
+ els_op = *(u8 *)(fh + 1);
-/**
- * fcoe_if_to_netdev() - parse a name buffer to get netdev
- * @ifname: fixed array for output parsed ifname
- * @buffer: incoming buffer to be copied
- *
- * Returns: NULL or ptr to netdeive
- */
-static struct net_device *fcoe_if_to_netdev(const char *buffer)
-{
- char *cp;
- char ifname[IFNAMSIZ + 2];
-
- if (buffer) {
- strlcpy(ifname, buffer, IFNAMSIZ);
- cp = ifname + strlen(ifname);
- while (--cp >= ifname && *cp == '\n')
- *cp = '\0';
- return dev_get_by_name(&init_net, ifname);
+ if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP &&
+ fip->flogi_oxid == ntohs(fh->fh_ox_id) &&
+ els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) {
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fip->update_mac(fip, fip->data_src_addr, granted_mac);
+ memcpy(fip->data_src_addr, granted_mac, ETH_ALEN);
}
- return NULL;
+
+ /*
+ * Convert skb into an fc_frame containing only the ELS.
+ */
+ skb_pull(skb, (u8 *)fh - skb->data);
+ skb_trim(skb, els_len);
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_sof(fp) = FC_SOF_I3;
+ fr_eof(fp) = FC_EOF_T;
+ fr_dev(fp) = lp;
+
+ stats = fc_lport_get_stats(lp);
+ stats->RxFrames++;
+ stats->RxWords += skb->len / FIP_BPW;
+
+ fc_exch_recv(lp, lp->emp, fp);
+ return;
+
+len_err:
+ FIP_DBG("FIP length error in descriptor type %x len %zu\n",
+ desc->fip_dtype, dlen);
+drop:
+ kfree_skb(skb);
}
/**
- * fcoe_netdev_to_module_owner() - finds out the nic drive moddule of the netdev
- * @netdev: the target netdev
+ * fcoe_ctlr_recv_els() - Handle an incoming link reset frame.
+ * @fip: FCoE controller.
+ * @fh: Received FIP header.
*
- * Returns: ptr to the struct module, NULL for failure
+ * There may be multiple VN_Port descriptors.
+ * The overall length has already been checked.
*/
-static struct module *
-fcoe_netdev_to_module_owner(const struct net_device *netdev)
+static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
+ struct fip_header *fh)
{
- struct device *dev;
-
- if (!netdev)
- return NULL;
-
- dev = netdev->dev.parent;
- if (!dev)
- return NULL;
+ struct fip_desc *desc;
+ struct fip_mac_desc *mp;
+ struct fip_wwn_desc *wp;
+ struct fip_vn_desc *vp;
+ size_t rlen;
+ size_t dlen;
+ struct fcoe_fcf *fcf = fip->sel_fcf;
+ struct fc_lport *lp = fip->lp;
+ u32 desc_mask;
+
+ FIP_DBG("Clear Virtual Link received\n");
+ if (!fcf)
+ return;
+ if (!fcf || !fc_host_port_id(lp->host))
+ return;
- if (!dev->driver)
- return NULL;
+ /*
+ * mask of required descriptors. Validating each one clears its bit.
+ */
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID);
+
+ rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
+ desc = (struct fip_desc *)(fh + 1);
+ while (rlen >= sizeof(*desc)) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen > rlen)
+ return;
+ switch (desc->fip_dtype) {
+ case FIP_DT_MAC:
+ mp = (struct fip_mac_desc *)desc;
+ if (dlen < sizeof(*mp))
+ return;
+ if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac))
+ return;
+ desc_mask &= ~BIT(FIP_DT_MAC);
+ break;
+ case FIP_DT_NAME:
+ wp = (struct fip_wwn_desc *)desc;
+ if (dlen < sizeof(*wp))
+ return;
+ if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
+ return;
+ desc_mask &= ~BIT(FIP_DT_NAME);
+ break;
+ case FIP_DT_VN_ID:
+ vp = (struct fip_vn_desc *)desc;
+ if (dlen < sizeof(*vp))
+ return;
+ if (compare_ether_addr(vp->fd_mac,
+ fip->data_src_addr) == 0 &&
+ get_unaligned_be64(&vp->fd_wwpn) == lp->wwpn &&
+ ntoh24(vp->fd_fc_id) == fc_host_port_id(lp->host))
+ desc_mask &= ~BIT(FIP_DT_VN_ID);
+ break;
+ default:
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
+ return;
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
- return dev->driver->owner;
+ /*
+ * reset only if all required descriptors were present and valid.
+ */
+ if (desc_mask) {
+ FIP_DBG("missing descriptors mask %x\n", desc_mask);
+ } else {
+ FIP_DBG("performing Clear Virtual Link\n");
+ fcoe_ctlr_reset(fip, FIP_ST_ENABLED);
+ }
}
/**
- * fcoe_ethdrv_get() - Hold the Ethernet driver
- * @netdev: the target netdev
+ * fcoe_ctlr_recv() - Receive a FIP frame.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
*
- * Holds the Ethernet driver module by try_module_get() for
- * the corresponding netdev.
- *
- * Returns: 0 for succsss
+ * This is called from NET_RX_SOFTIRQ.
*/
-static int fcoe_ethdrv_get(const struct net_device *netdev)
+void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- struct module *owner;
-
- owner = fcoe_netdev_to_module_owner(netdev);
- if (owner) {
- printk(KERN_DEBUG "fcoe:hold driver module %s for %s\n",
- module_name(owner), netdev->name);
- return try_module_get(owner);
- }
- return -ENODEV;
+ spin_lock_bh(&fip->fip_recv_list.lock);
+ __skb_queue_tail(&fip->fip_recv_list, skb);
+ spin_unlock_bh(&fip->fip_recv_list.lock);
+ schedule_work(&fip->recv_work);
}
+EXPORT_SYMBOL(fcoe_ctlr_recv);
/**
- * fcoe_ethdrv_put() - Release the Ethernet driver
- * @netdev: the target netdev
+ * fcoe_ctlr_recv_handler() - Receive a FIP frame.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
*
- * Releases the Ethernet driver module by module_put for
- * the corresponding netdev.
- *
- * Returns: 0 for succsss
+ * Returns non-zero if the frame is dropped.
*/
-static int fcoe_ethdrv_put(const struct net_device *netdev)
+static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- struct module *owner;
+ struct fip_header *fiph;
+ struct ethhdr *eh;
+ enum fip_state state;
+ u16 op;
+ u8 sub;
+
+ if (skb_linearize(skb))
+ goto drop;
+ if (skb->len < sizeof(*fiph))
+ goto drop;
+ eh = eth_hdr(skb);
+ if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
+ compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS))
+ goto drop;
+ fiph = (struct fip_header *)skb->data;
+ op = ntohs(fiph->fip_op);
+ sub = fiph->fip_subcode;
+
+ FIP_DBG_LVL(2, "ver %x op %x/%x dl %x fl %x\n",
+ FIP_VER_DECAPS(fiph->fip_ver), op, sub,
+ ntohs(fiph->fip_dl_len), ntohs(fiph->fip_flags));
+
+ if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
+ goto drop;
+ if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
+ goto drop;
+
+ spin_lock_bh(&fip->lock);
+ state = fip->state;
+ if (state == FIP_ST_AUTO) {
+ fip->map_dest = 0;
+ fip->state = FIP_ST_ENABLED;
+ state = FIP_ST_ENABLED;
+ FIP_DBG("using FIP mode\n");
+ }
+ spin_unlock_bh(&fip->lock);
+ if (state != FIP_ST_ENABLED)
+ goto drop;
- owner = fcoe_netdev_to_module_owner(netdev);
- if (owner) {
- printk(KERN_DEBUG "fcoe:release driver module %s for %s\n",
- module_name(owner), netdev->name);
- module_put(owner);
+ if (op == FIP_OP_LS) {
+ fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
return 0;
}
- return -ENODEV;
+ if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
+ fcoe_ctlr_recv_adv(fip, skb);
+ else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
+ fcoe_ctlr_recv_clr_vlink(fip, fiph);
+ kfree_skb(skb);
+ return 0;
+drop:
+ kfree_skb(skb);
+ return -1;
}
/**
- * fcoe_destroy() - handles the destroy from sysfs
- * @buffer: expcted to be a eth if name
- * @kp: associated kernel param
+ * fcoe_ctlr_select() - Select the best FCF, if possible.
+ * @fip: FCoE controller.
+ *
+ * If there are conflicting advertisements, no FCF can be chosen.
*
- * Returns: 0 for success
+ * Called with lock held.
*/
-static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
+static void fcoe_ctlr_select(struct fcoe_ctlr *fip)
{
- int rc;
- struct net_device *netdev;
-
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
- goto out_nodev;
- }
- /* look for existing lport */
- if (!fcoe_hostlist_lookup(netdev)) {
- rc = -ENODEV;
- goto out_putdev;
- }
- /* pass to transport */
- rc = fcoe_transport_release(netdev);
- if (rc) {
- printk(KERN_ERR "fcoe: fcoe_transport_release(%s) failed\n",
- netdev->name);
- rc = -EIO;
- goto out_putdev;
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *best = NULL;
+
+ list_for_each_entry(fcf, &fip->fcfs, list) {
+ FIP_DBG("consider FCF for fab %llx VFID %d map %x val %d\n",
+ fcf->fabric_name, fcf->vfid,
+ fcf->fc_map, fcoe_ctlr_mtu_valid(fcf));
+ if (!fcoe_ctlr_fcf_usable(fcf)) {
+ FIP_DBG("FCF for fab %llx map %x %svalid %savailable\n",
+ fcf->fabric_name, fcf->fc_map,
+ (fcf->flags & FIP_FL_SOL) ? "" : "in",
+ (fcf->flags & FIP_FL_AVAIL) ? "" : "un");
+ continue;
+ }
+ if (!best) {
+ best = fcf;
+ continue;
+ }
+ if (fcf->fabric_name != best->fabric_name ||
+ fcf->vfid != best->vfid ||
+ fcf->fc_map != best->fc_map) {
+ FIP_DBG("conflicting fabric, VFID, or FC-MAP\n");
+ return;
+ }
+ if (fcf->pri < best->pri)
+ best = fcf;
}
- fcoe_ethdrv_put(netdev);
- rc = 0;
-out_putdev:
- dev_put(netdev);
-out_nodev:
- return rc;
+ fip->sel_fcf = best;
}
/**
- * fcoe_create() - Handles the create call from sysfs
- * @buffer: expcted to be a eth if name
- * @kp: associated kernel param
+ * fcoe_ctlr_timeout() - FIP timer function.
+ * @arg: &fcoe_ctlr pointer.
*
- * Returns: 0 for success
+ * Ages FCFs. Triggers FCF selection if possible. Sends keep-alives.
*/
-static int fcoe_create(const char *buffer, struct kernel_param *kp)
+static void fcoe_ctlr_timeout(unsigned long arg)
{
- int rc;
- struct net_device *netdev;
-
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
- goto out_nodev;
+ struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
+ struct fcoe_fcf *sel;
+ struct fcoe_fcf *fcf;
+ unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ DECLARE_MAC_BUF(buf);
+ u8 send_ctlr_ka;
+ u8 send_port_ka;
+
+ spin_lock_bh(&fip->lock);
+ if (fip->state == FIP_ST_DISABLED) {
+ spin_unlock_bh(&fip->lock);
+ return;
}
- /* look for existing lport */
- if (fcoe_hostlist_lookup(netdev)) {
- rc = -EEXIST;
- goto out_putdev;
+
+ fcf = fip->sel_fcf;
+ fcoe_ctlr_age_fcfs(fip);
+
+ sel = fip->sel_fcf;
+ if (!sel && fip->sel_time && time_after_eq(jiffies, fip->sel_time)) {
+ fcoe_ctlr_select(fip);
+ sel = fip->sel_fcf;
+ fip->sel_time = 0;
}
- fcoe_ethdrv_get(netdev);
-
- /* pass to transport */
- rc = fcoe_transport_attach(netdev);
- if (rc) {
- printk(KERN_ERR "fcoe: fcoe_transport_attach(%s) failed\n",
- netdev->name);
- fcoe_ethdrv_put(netdev);
- rc = -EIO;
- goto out_putdev;
+
+ if (sel != fcf) {
+ fcf = sel; /* the old FCF may have been freed */
+ if (sel) {
+ printk(KERN_INFO "host%d: FIP selected "
+ "Fibre-Channel Forwarder MAC %s\n",
+ fip->lp->host->host_no,
+ print_mac(buf, sel->fcf_mac));
+ memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN);
+ fip->port_ka_time = jiffies +
+ msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ fip->ctlr_ka_time = jiffies + sel->fka_period;
+ fip->link = 1;
+ } else {
+ printk(KERN_NOTICE "host%d: "
+ "FIP Fibre-Channel Forwarder timed out. "
+ "Starting FCF discovery.\n",
+ fip->lp->host->host_no);
+ fip->link = 0;
+ }
+ schedule_work(&fip->link_work);
}
- rc = 0;
-out_putdev:
- dev_put(netdev);
-out_nodev:
- return rc;
-}
-module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(create, "string");
-MODULE_PARM_DESC(create, "Create fcoe port using net device passed in.");
-module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(destroy, "string");
-MODULE_PARM_DESC(destroy, "Destroy fcoe port");
+ send_ctlr_ka = 0;
+ send_port_ka = 0;
+ if (sel) {
+ if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
+ fip->ctlr_ka_time = jiffies + sel->fka_period;
+ send_ctlr_ka = 1;
+ }
+ if (time_after(next_timer, fip->ctlr_ka_time))
+ next_timer = fip->ctlr_ka_time;
-/**
- * fcoe_link_ok() - Check if link is ok for the fc_lport
- * @lp: ptr to the fc_lport
- *
- * Any permanently-disqualifying conditions have been previously checked.
- * This also updates the speed setting, which may change with link for 100/1000.
- *
- * This function should probably be checking for PAUSE support at some point
- * in the future. Currently Per-priority-pause is not determinable using
- * ethtool, so we shouldn't be restrictive until that problem is resolved.
- *
- * Returns: 0 if link is OK for use by FCoE.
- *
- */
-int fcoe_link_ok(struct fc_lport *lp)
-{
- struct fcoe_softc *fc = lport_priv(lp);
- struct net_device *dev = fc->real_dev;
- struct ethtool_cmd ecmd = { ETHTOOL_GSET };
- int rc = 0;
-
- if ((dev->flags & IFF_UP) && netif_carrier_ok(dev)) {
- dev = fc->phys_dev;
- if (dev->ethtool_ops->get_settings) {
- dev->ethtool_ops->get_settings(dev, &ecmd);
- lp->link_supported_speeds &=
- ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
- if (ecmd.supported & (SUPPORTED_1000baseT_Half |
- SUPPORTED_1000baseT_Full))
- lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
- if (ecmd.supported & SUPPORTED_10000baseT_Full)
- lp->link_supported_speeds |=
- FC_PORTSPEED_10GBIT;
- if (ecmd.speed == SPEED_1000)
- lp->link_speed = FC_PORTSPEED_1GBIT;
- if (ecmd.speed == SPEED_10000)
- lp->link_speed = FC_PORTSPEED_10GBIT;
+ if (time_after_eq(jiffies, fip->port_ka_time)) {
+ fip->port_ka_time += jiffies +
+ msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ send_port_ka = 1;
}
- } else
- rc = -1;
+ if (time_after(next_timer, fip->port_ka_time))
+ next_timer = fip->port_ka_time;
+ mod_timer(&fip->timer, next_timer);
+ } else if (fip->sel_time) {
+ next_timer = fip->sel_time +
+ msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ mod_timer(&fip->timer, next_timer);
+ }
+ spin_unlock_bh(&fip->lock);
- return rc;
+ if (send_ctlr_ka)
+ fcoe_ctlr_send_keep_alive(fip, 0, fip->ctl_src_addr);
+ if (send_port_ka)
+ fcoe_ctlr_send_keep_alive(fip, 1, fip->data_src_addr);
}
-EXPORT_SYMBOL_GPL(fcoe_link_ok);
/**
- * fcoe_percpu_clean() - Clear the pending skbs for an lport
- * @lp: the fc_lport
+ * fcoe_ctlr_link_work() - worker thread function for link changes.
+ * @work: pointer to link_work member inside &fcoe_ctlr.
+ *
+ * See if the link status has changed and if so, report it.
+ *
+ * This is here because fc_linkup() and fc_linkdown() must not
+ * be called from the timer directly, since they use a mutex.
*/
-void fcoe_percpu_clean(struct fc_lport *lp)
+static void fcoe_ctlr_link_work(struct work_struct *work)
{
- int idx;
- struct fcoe_percpu_s *pp;
- struct fcoe_rcv_info *fr;
- struct sk_buff_head *list;
- struct sk_buff *skb, *next;
- struct sk_buff *head;
-
- for (idx = 0; idx < NR_CPUS; idx++) {
- if (fcoe_percpu[idx]) {
- pp = fcoe_percpu[idx];
- spin_lock_bh(&pp->fcoe_rx_list.lock);
- list = &pp->fcoe_rx_list;
- head = list->next;
- for (skb = head; skb != (struct sk_buff *)list;
- skb = next) {
- next = skb->next;
- fr = fcoe_dev_from_skb(skb);
- if (fr->fr_dev == lp) {
- __skb_unlink(skb, list);
- kfree_skb(skb);
- }
- }
- spin_unlock_bh(&pp->fcoe_rx_list.lock);
- }
+ struct fcoe_ctlr *fip;
+ int link;
+ int last_link;
+
+ fip = container_of(work, struct fcoe_ctlr, link_work);
+ spin_lock_bh(&fip->lock);
+ last_link = fip->last_link;
+ link = fip->link;
+ fip->last_link = link;
+ spin_unlock_bh(&fip->lock);
+
+ if (last_link != link) {
+ if (link)
+ fc_linkup(fip->lp);
+ else
+ fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT);
}
}
-EXPORT_SYMBOL_GPL(fcoe_percpu_clean);
/**
- * fcoe_clean_pending_queue() - Dequeue a skb and free it
- * @lp: the corresponding fc_lport
- *
- * Returns: none
+ * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames.
+ * @recv_work: pointer to recv_work member inside &fcoe_ctlr.
*/
-void fcoe_clean_pending_queue(struct fc_lport *lp)
+static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
{
- struct fcoe_softc *fc = lport_priv(lp);
+ struct fcoe_ctlr *fip;
struct sk_buff *skb;
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
- while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
- kfree_skb(skb);
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
+ fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
+ spin_lock_bh(&fip->fip_recv_list.lock);
+ while ((skb = __skb_dequeue(&fip->fip_recv_list))) {
+ spin_unlock_bh(&fip->fip_recv_list.lock);
+ fcoe_ctlr_recv_handler(fip, skb);
+ spin_lock_bh(&fip->fip_recv_list.lock);
}
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+ spin_unlock_bh(&fip->fip_recv_list.lock);
}
-EXPORT_SYMBOL_GPL(fcoe_clean_pending_queue);
/**
- * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport
- * @sht: ptr to the scsi host templ
- * @priv_size: size of private data after fc_lport
+ * fcoe_ctlr_recv_flogi() - snoop Pre-FIP receipt of FLOGI response or request.
+ * @fip: FCoE controller.
+ * @fp: FC frame.
+ * @sa: Ethernet source MAC address from received FCoE frame.
*
- * Returns: ptr to Scsi_Host
- * TODO: to libfc?
- */
-static inline struct Scsi_Host *
-libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
-{
- return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size);
-}
-
-/**
- * fcoe_host_alloc() - Allocate a Scsi_Host with room for the fcoe_softc
- * @sht: ptr to the scsi host templ
- * @priv_size: size of private data after fc_lport
+ * Snoop potential response to FLOGI or even incoming FLOGI.
*
- * Returns: ptr to Scsi_Host
- */
-struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *sht, int priv_size)
-{
- return libfc_host_alloc(sht, sizeof(struct fcoe_softc) + priv_size);
-}
-EXPORT_SYMBOL_GPL(fcoe_host_alloc);
-
-/**
- * fcoe_reset() - Resets the fcoe
- * @shost: shost the reset is from
+ * The caller has checked that we are waiting for login as indicated
+ * by fip->flogi_oxid != FC_XID_UNKNOWN.
+ *
+ * The caller is responsible for freeing the frame.
*
- * Returns: always 0
+ * Return non-zero if the frame should not be delivered to libfc.
*/
-int fcoe_reset(struct Scsi_Host *shost)
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_frame *fp, u8 *sa)
{
- struct fc_lport *lport = shost_priv(shost);
- fc_lport_reset(lport);
+ struct fc_frame_header *fh;
+ u8 op;
+ u8 mac[ETH_ALEN];
+
+ fh = fc_frame_header_get(fp);
+ if (fh->fh_type != FC_TYPE_ELS)
+ return 0;
+
+ op = fc_frame_payload_op(fp);
+ if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+ fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
+
+ spin_lock_bh(&fip->lock);
+ if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
+ spin_unlock_bh(&fip->lock);
+ return -EINVAL;
+ }
+ fip->state = FIP_ST_NON_FIP;
+ FIP_DBG("received FLOGI LS_ACC using non-FIP mode\n");
+
+ /*
+ * FLOGI accepted.
+ * If the src mac addr is FC_OUI-based, then we mark the
+ * address_mode flag to use FC_OUI-based Ethernet DA.
+ * Otherwise we use the FCoE gateway addr
+ */
+ if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
+ fip->map_dest = 1;
+ } else {
+ memcpy(fip->dest_addr, sa, ETH_ALEN);
+ fip->map_dest = 0;
+ }
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ memcpy(mac, fip->data_src_addr, ETH_ALEN);
+ fc_fcoe_set_mac(fip->data_src_addr, fh->fh_d_id);
+ spin_unlock_bh(&fip->lock);
+
+ fip->update_mac(fip, mac, fip->data_src_addr);
+ } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
+ /*
+ * Save source MAC for point-to-point responses.
+ */
+ spin_lock_bh(&fip->lock);
+ if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
+ memcpy(fip->dest_addr, sa, ETH_ALEN);
+ fip->map_dest = 0;
+ if (fip->state == FIP_ST_NON_FIP)
+ FIP_DBG("received FLOGI REQ, "
+ "using non-FIP mode\n");
+ fip->state = FIP_ST_NON_FIP;
+ }
+ spin_unlock_bh(&fip->lock);
+ }
return 0;
}
-EXPORT_SYMBOL_GPL(fcoe_reset);
+EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
/**
* fcoe_wwn_from_mac() - Converts 48-bit IEEE MAC address to 64-bit FC WWN.
}
EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
-/**
- * fcoe_hostlist_lookup_softc() - find the corresponding lport by a given device
- * @device: this is currently ptr to net_device
- *
- * Returns: NULL or the located fcoe_softc
- */
-static struct fcoe_softc *
-fcoe_hostlist_lookup_softc(const struct net_device *dev)
-{
- struct fcoe_softc *fc;
-
- read_lock(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- if (fc->real_dev == dev) {
- read_unlock(&fcoe_hostlist_lock);
- return fc;
- }
- }
- read_unlock(&fcoe_hostlist_lock);
- return NULL;
-}
-
-/**
- * fcoe_hostlist_lookup() - Find the corresponding lport by netdev
- * @netdev: ptr to net_device
- *
- * Returns: 0 for success
- */
-struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
-{
- struct fcoe_softc *fc;
-
- fc = fcoe_hostlist_lookup_softc(netdev);
-
- return (fc) ? fc->lp : NULL;
-}
-EXPORT_SYMBOL_GPL(fcoe_hostlist_lookup);
-
-/**
- * fcoe_hostlist_add() - Add a lport to lports list
- * @lp: ptr to the fc_lport to badded
- *
- * Returns: 0 for success
- */
-int fcoe_hostlist_add(const struct fc_lport *lp)
-{
- struct fcoe_softc *fc;
-
- fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
- if (!fc) {
- fc = lport_priv(lp);
- write_lock_bh(&fcoe_hostlist_lock);
- list_add_tail(&fc->list, &fcoe_hostlist);
- write_unlock_bh(&fcoe_hostlist_lock);
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_hostlist_add);
-
-/**
- * fcoe_hostlist_remove() - remove a lport from lports list
- * @lp: ptr to the fc_lport to badded
- *
- * Returns: 0 for success
- */
-int fcoe_hostlist_remove(const struct fc_lport *lp)
-{
- struct fcoe_softc *fc;
-
- fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
- BUG_ON(!fc);
- write_lock_bh(&fcoe_hostlist_lock);
- list_del(&fc->list);
- write_unlock_bh(&fcoe_hostlist_lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_hostlist_remove);
-
/**
* fcoe_libfc_config() - sets up libfc related properties for lport
* @lp: ptr to the fc_lport
return 0;
}
EXPORT_SYMBOL_GPL(fcoe_libfc_config);
-
-/**
- * fcoe_init() - fcoe module loading initialization
- *
- * Initialization routine
- * 1. Will create fc transport software structure
- * 2. initialize the link list of port information structure
- *
- * Returns 0 on success, negative on failure
- */
-static int __init fcoe_init(void)
-{
- int cpu;
- struct fcoe_percpu_s *p;
-
-
- INIT_LIST_HEAD(&fcoe_hostlist);
- rwlock_init(&fcoe_hostlist_lock);
-
-#ifdef CONFIG_HOTPLUG_CPU
- register_cpu_notifier(&fcoe_cpu_notifier);
-#endif /* CONFIG_HOTPLUG_CPU */
-
- /*
- * initialize per CPU interrupt thread
- */
- for_each_online_cpu(cpu) {
- p = kzalloc(sizeof(struct fcoe_percpu_s), GFP_KERNEL);
- if (p) {
- p->thread = kthread_create(fcoe_percpu_receive_thread,
- (void *)p,
- "fcoethread/%d", cpu);
-
- /*
- * if there is no error then bind the thread to the cpu
- * initialize the semaphore and skb queue head
- */
- if (likely(!IS_ERR(p->thread))) {
- p->cpu = cpu;
- fcoe_percpu[cpu] = p;
- skb_queue_head_init(&p->fcoe_rx_list);
- kthread_bind(p->thread, cpu);
- wake_up_process(p->thread);
- } else {
- fcoe_percpu[cpu] = NULL;
- kfree(p);
- }
- }
- }
-
- /*
- * setup link change notification
- */
- fcoe_dev_setup();
-
- setup_timer(&fcoe_timer, fcoe_watchdog, 0);
-
- mod_timer(&fcoe_timer, jiffies + (10 * HZ));
-
- /* initiatlize the fcoe transport */
- fcoe_transport_init();
-
- fcoe_sw_init();
-
- return 0;
-}
-module_init(fcoe_init);
-
-/**
- * fcoe_exit() - fcoe module unloading cleanup
- *
- * Returns 0 on success, negative on failure
- */
-static void __exit fcoe_exit(void)
-{
- u32 idx;
- struct fcoe_softc *fc, *tmp;
- struct fcoe_percpu_s *p;
- struct sk_buff *skb;
-
- /*
- * Stop all call back interfaces
- */
-#ifdef CONFIG_HOTPLUG_CPU
- unregister_cpu_notifier(&fcoe_cpu_notifier);
-#endif /* CONFIG_HOTPLUG_CPU */
- fcoe_dev_cleanup();
-
- /*
- * stop timer
- */
- del_timer_sync(&fcoe_timer);
-
- /* releases the associated fcoe transport for each lport */
- list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
- fcoe_transport_release(fc->real_dev);
-
- for (idx = 0; idx < NR_CPUS; idx++) {
- if (fcoe_percpu[idx]) {
- kthread_stop(fcoe_percpu[idx]->thread);
- p = fcoe_percpu[idx];
- spin_lock_bh(&p->fcoe_rx_list.lock);
- while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
- kfree_skb(skb);
- spin_unlock_bh(&p->fcoe_rx_list.lock);
- if (fcoe_percpu[idx]->crc_eof_page)
- put_page(fcoe_percpu[idx]->crc_eof_page);
- kfree(fcoe_percpu[idx]);
- }
- }
-
- /* remove sw trasnport */
- fcoe_sw_exit();
-
- /* detach the transport */
- fcoe_transport_exit();
-}
-module_exit(fcoe_exit);
git.samba.org / sfrench / cifs-2.6.git / blobdiff